Percussion tool



June 9, 1925.

w. H'. SCULLY PERCUSSION TOOL Filed April 4,- 1922 Fatentecl June 9,1925.

UNITED: STATES.

WALTER n. soULLY, or FLORENCE, new JERSEY.

PERCUSSION Toor..

Application inea Apen 4.,

To all w wm t concern Be it known that I, lVALTnR Souany, a citizen ofthe United States, and a resident of Florence, in the county ofBurlington and State of New Jersey, have invented certain new and usefulImprovements in Percussion Tools, of which the following is aspecification.

rlhis invention relates to improvemei'ite i0 in percussion tools adaptedto bey operated by compressed air or other motive fluid and moreparticularly relates to an improvement in pneumatic drills, hammers orthe like.

The object of the invention isf to providev an improvement of thischaracter `in which the` percussion tool proper may `be readily adjustedangularly without disassociating it from the other elements of theorganization.

Another object is to provide ap'ercussion tool of this character whichmay be conveniently manipulated and which does not subject the operatorto all of the shocks -incident to the drilling or hammering operation,the major portion of such shocks being taken up andabsorbed and notbeing transmitted to the handle portion of the tool.

Another object is to lprovide an improvement of this characterwhich isof `simplev and durable construction, reliable'y inoperation, and easyand inexpensive to manufac ture and apply. i 1

Other objects and advantages of the in-V vention reside in certain novelfeatures of construction, combination and' arrangement of parts whichwill be hereinafter more fully described and particularlypointed out inthe appended claims, reference being had to theaccompanying'drawingsforming partof this specification, jand in which:V-

Figure 1 is a view in perspective, illustrating one embodiment of theinvention,

Figure 2 is a view thereof in longitudinal section, parts being shown inelevation for the, sake of illustration;

Figure 3 is a group view, illustrating .respectively the parts of theinvention .'prior to assembly; i

Figure 4 isa detail View of the bushing, showing the same in verticalsection.

Referring to the drawings wherein for the sake of illustration is shownthe preferred embodiment of the invention, the numeral designatesgenerally a percussion tool which may be of any type and whicnpreferably embodies a cylinder 11 having a 1922. SerialV No. 5{l9,506.

handle 12 at one end and having "a piston or hammer 13 operatingtherein. The piston or'hammer 13 is operated by the action ditcompressed fluid in the usual` manner and servesto. impart percussionmovement. to the percussionV tool toV be hereinafter'n'iore fullydescribed. The arrangement may be valveless `or any suitable `system offluid distribution may be utilized. However, the particular .means forimparting percussive lmovement to the tool of itself constitutes noengagement, the bushing having ak driving tit in the handle 15. Aportion lofthe bore of the 4bushing is cylindrical, as at 18, and aportionisof polygonal formation, as at 19. A percussion tool desginatedgenerally at suoli as a drill, chisel, hammer or the like is providedand includes a shank 21 having a `portion 22 of circular formationadapted to operate in the portion. 18 of the bushing of correspondingformation and the shank 21 also includes .a portion 23 of polygonalformation and vadapted to operate inv the section 19 of the bushing. Asleeve 25 is arranged on the shank 21 lof the tool 2U and is provided atits'inner end with an annular flange 26, the sleeve and the annularflange being accommodated in a counterbor'e 15a provided at the outerend of the 'tubular handleI 15. The outer end of the sleeve 25 hassecured-thereto `a collar 27, the periphery off-which is milled, as at28. Common means isV employed forrsecuring the collar 27 to thev sleeve25 andfor securing the sleeve 25 to `theshank 21 of the tool, 'andthisinean's preferably comprises a set screw 29 having Ythreadedengagement with radial openings provided tliereforin the sleeveand collar and Vhaving its inner end received lin a depression providedtherefor in the shank 21 of the drill.

A coil spring 30 is arranged on the sleeve 25 within the counterbore 15aone end `of the coil spring abutting the flange 26 of the sleeve. Theother end of the spring 30 abuts an annular plug or ring 31 having screwthreaded engagement with the outer end o't' the handle l5 and havingsnug Working lit with the sleeve 25. The spring 30 is tensioned toresist outward movement ot the tool 2O since When the tool moves out-Wardly it carries the sleeve With it and since this movement of thesleeve tends to increase the tension or 'further compress the c'oilspring 30, and this action being opposed by the resiliency of thespring. The stroke of the percussion tool Qt) is not sunglcient to carryt-hepolygonally formed portion 23 oi" the shank oi'. the tool out et't-he section 19 ot the bushing that is out oi the section which is ofpolygonal formation so that during normal operation ot the tool it isreciprocated back and forth Without changing its angular relation withrespect to the handle l5. rlhis angular relation may be changed bygrasping the shank 2l of the tool Q0 and pulling it outwardly againstthe tension ol the spring until the portion 23 has been drawn out tromthe socket 19 at which time thetool may be rotated to vary its angularrelation with respect to the handle 15. rlfhus the character of thedrilling or hammering operation may be varied Without necessity ot theoperator assuming strained and abnormal positions. Again, it is notnecessary tor the ope-rat r to directly grip the shank 2l ot the tool asthe handle l5 obviates this. Moreover, the shocks received by thetool'() and shank 2l are not transmitted to the handle inview oi theinterposition of the spring 30.

It is to be understood that the tension of the spring 30 is suiiicientto prevent the polygonally formed portion of the 'shank :from beingdisplaced from the bushing and since the spring thus retains the tool inplace the operator may grasp the barrel of the tool and it is notnecessary torhim to hold the tool and the operator is thus relievedit'rom shocks and strains to Which he might otherwise be subjected it itwere necessary for him to directly grasp the shank of the tool.

I claim:

l. In a percussionv tool, a tubular handle, a bushing inserted in saidhandle and having a portion ot polygonal formation and constituting asocket, a percussion t-ool having a shank including a portion ofpolygonal formation operating in said socket, and a spring connectedWith the shank and cooperating with the tubular handle for cushioningthe handle and itor constraining the polygonal portion ot the shank tomovement in the socket during its Working stroke and return movement butpermitting the same to be Withdrawn manually from the socket toangularly adjust the tool relative to t-he handle.

2. In a device ot the character described, a tubular handle, a bushinginserted in said handle and having a portion of polygonal formation andconstituting a socket, a percussion tool having a shank including aportionot polygonal formation operating in said socket, said handlehaving a counter- Lore at its outer end, a sleeve arranged on thcshankof the tool and operating in said connterbore, said sleevebeingsecured to the shank ot the tool, and acoil spring arranged on thesleeve ithin the counterbore and associated with the sleeve and with thetubulaihandle to` normally restrain the polygonal portion of the shankof the tool to operateV in the socket While permitting the same to be.withdrawn trom the socket and angularly adjusted.

3. In a device'ot' the character described, a tubular handle, a bushinginserted in said handle and having a portion ot polygonal formation andconstituting a socket, a percussion tool having a shank including aportion oit polygonal formation operating' in said socket, said handlehaving a counterbore at its outer end, a sleeve arranged on the shank otthe tool and operating in said counterbore and having an annular iiangcat its inner end, a collar arranged on the outer end of said sleeve, aset screw :tor securing the collar and the sleeve to the shank of thetool, a coil spring arranged on the sleeve Within the counterbore andabutting the annular iiange at its inner end and an annular cap havingthreaded connection With the outer end of the handle end of said spring.j

4t. In a device oi the character described,

and serving as an abutment for the outer a tubular handle having asocket orpolyg-` VALTER H. SCULLY.

